<template>
	<view>
		<!-- 商品图片轮播图 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000">
			<swiper-item v-for="(item, i) in goodsDetail.pics" :key="i">
				<image class="swiper-item" :src="item.pics_big_url" @click="preview(i)"></image>
			</swiper-item>
		</swiper>

		<!-- 商品信息区域 -->
		<view class="goods-info-box" v-if="JSON.stringify(goodsDetail) !== '{}'">
			<!-- <view class="goods-info-box" v-if="Object.keys(goodsDetail).length > 0"> -->
			<!-- 商品价格 -->
			<view class="price">￥{{goodsDetail.goods_price}}</view>
			<!-- 信息主体区域 -->
			<view class="goods-info-body">
				<!-- 商品名称 -->
				<view class="goods-name">{{goodsDetail.goods_name}}</view>
				<!-- 收藏 -->
				<view class="favi">
					<uni-icons type="star" size="18" color="gray"></uni-icons>
					<text>收藏</text>
				</view>
			</view>
			<!-- 运费 -->
			<view class="yf">快递：免运费{{cart.length}}--{{total}}</view>
		</view>

		<!-- 商品详细介绍 -->
		<rich-text :nodes="goodsDetail.goods_introduce"></rich-text>

		<!-- 商品导航 -->
		<view class="goods-nav">
			<uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick"
				@buttonClick="buttonClick"></uni-goods-nav>
		</view>
	</view>
</template>

<script>
	import {
		mapState,
		mapMutations,
		mapGetters
	} from 'vuex'
	export default {
		data() {
			return {
				// 商品详情
				goodsDetail: {},
				// 底部购物导航组件配置数据
				options: [{
					icon: 'shop',
					text: '店铺'
				}, {
					icon: 'cart',
					text: '购物车',
					info: 0
				}],
				// 右侧按钮组的配置对象
				buttonGroup: [{
					text: '加入购物车',
					backgroundColor: '#ff0000',
					color: '#fff'
				}, {
					text: '立即购买',
					backgroundColor: '#ffa200',
					color: '#fff'
				}]
			};
		},
		computed: {
			...mapState('m_cart', ['cart']),
			...mapGetters('m_cart', ['total'])
		},
		// watch: {
		// 	// total(newValue) {
		// 	// 	console.log(newValue)
		// 	// 	// 更新购物导航栏数据
		// 	// 	this.options[1].info = newValue
		// 	// }
		// 	// total 在页面第一次初始化完毕后也执行
		// 	total: {
		// 		handler: function(newValue) {
		// 			console.log('this==>', this)
		// 			console.log(newValue)
		// 			// 更新购物导航栏数据
		// 			this.options[1].info = newValue
		// 		},
		// 		immediate: true
		// 	}
		// },
		updated() {
			console.log('页面数据发生了变化，并且页面渲染完毕')
			this.options[1].info = this.total
		},
		onLoad(options) {
			console.log('产品详情', options)
			// 发起请求
			this.getGoodsDetail(options.goods_id)
		},
		methods: {
			...mapMutations('m_cart', ['addToCart']),
			// 获取产品详情
			async getGoodsDetail(goods_id) {
				const {
					data: res
				} = await uni.$http.get('/goods/detail', {
					goods_id
				})
				if (res.meta.status !== 200) return uni.$showMsg()
				// 处理产品介绍数据格式
				res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g,
					'<img style="vertical-align: middle;"').replace(/webp/g, 'jpg')
				// 为 data 中的数据赋值
				this.goodsDetail = res.message
			},
			// 图片预览事件处理函数
			preview(i) {
				console.log(i)
				uni.previewImage({
					current: i,
					urls: this.goodsDetail.pics.map(item => item.pics_big_url)
				})
				console.log(this.goodsDetail.pics.map(item => item.pics_big_url))
			},

			// 底部购物导航
			onClick(e) {
				console.log('左侧', e)
				if (e.content.text === '购物车') {
					uni.switchTab({
						url: '/pages/cart/cart'
					})
				}
			},
			buttonClick(e) {
				console.log('右侧', e)
				if (e.content.text === '加入购物车') {
					this.addToCart({
						goods_id: this.goodsDetail.goods_id,
						goods_state: true, // 商品选中状态
						goods_small_logo: this.goodsDetail.goods_small_logo,
						goods_name: this.goodsDetail.goods_name,
						goods_price: this.goodsDetail.goods_price,
						goods_count: 1
					})
				}
			}
		}
	}
</script>

<style lang="scss">
	swiper {
		height: 750rpx;

		.swiper-item {
			width: 100%;
			height: 100%;
		}
	}

	// 商品信息区域的样式
	.goods-info-box {
		padding: 10px;
		padding-right: 0;

		.price {
			color: #c00000;
			font-size: 18px;
			margin: 10px 0;
		}

		.goods-info-body {
			display: flex;
			justify-content: space-between;

			.goods-name {
				font-size: 13px;
				padding-right: 10px;
			}

			// 收藏区域
			.favi {
				width: 120px;
				font-size: 12px;
				display: flex;
				flex-direction: column;
				justify-content: center;
				align-items: center;
				border-left: 1px solid #efefef;
				color: gray;
			}
		}

		// 运费
		.yf {
			margin: 10px 0;
			font-size: 12px;
			color: gray;
		}
	}

	.goods-nav {
		position: sticky;
		bottom: 0;
	}
</style>